Larger ozona tins?

I love the Ozona Raspberry. But they seem to only come in those handy but so very NON-airtight twist-container-thingies.Is there any way one can get his or her hands on a bigger tin, eg. 25g, without buying several 5g tins and dumping them into an old SG tin or something like that.Not only would that be annoying, but also pricey. 5 x 5g ~ £15, which is almost on par with SWS.

Is there a point in contacting Pöschl directly, or are they too big a company to care about a lil' snuffer's silly predicaments?